static void Main()
{
string s = Console.ReadLine();
Parser p = new Parser();
p.main_calculator(s);
}
static void Main()
{
bool _right = true;
while (_right)
{
Console.WriteLine("please enter string\nfor example 2+3-4 or\nplease enter 1 for exit");
string s = Console.ReadLine();
if (s == "1")
{
return;
}
Parser p = new Parser();
Console.WriteLine(p.main_calculator(s).ToString());
}
}
